Jeep Cherokee

 Service Manual

Transmission and transfer case » Automatic transmission-30RH » Cleaning and inspection
Front servo

Clean the servo piston components with solvent and dry them with compressed air. Wipe the band clean with lint free shop towels.

Replace the front band if distorted, lining is burned, flaking off, or worn to the point where the grooves in the lining material are no longer visible.

Inspect the servo components (Fig. 224). Replace the springs if collapsed, distorted or broken. Replace the guide, rod and piston if cracked, bent, or worn.

Discard the servo snap ring if distorted or warped.

Check the servo piston bore for wear. If the bore is severely scored, or damaged, it will be necessary to replace the case.

Replace any servo component if doubt exists about condition. Do not reuse suspect parts.

Fig. 224

1 - PISTON RINGS
2 - O-RING
3 - SNAP-RING
4 - SEAL RING
5 - PISTON ROD GUIDE
6 - SNAP-RING
7 - SERVO SPRING
8 - PISTON ROD
9 - SERVO PISTON

Rear servo

Remove and discard the servo piston seal ring (Fig.

225). Then clean the servo components with solvent and dry with compressed air. Replace either spring if collapsed, distorted or broken. Replace the plug and piston if cracked, bent, or worn. Discard the servo snap rings and use a new ones at assembly.

Governor and park gear

Extension housing and park lock

Valve body

Transmission

Overrunning clutch/low-reverse drum/overdrive piston retainer

Front servo

Oil pump and reaction shaft support

Front clutch

Rear clutch

Planetary geartrain/output shaft